What is short wave infrared?

What is short wave infrared?

Short Wave IR (SWIR) is a subset of the infrared band in the electromagnetic spectrum, covering the wavelengths ranging from 1.4 to 3 microns. This wavelength is not visible to human eyes and as a result can often offer a better image than what is achievable with visible light imaging.

Why do the different parts of the spectrum have different effects?

Electromagnetic radiation interacts with matter in different ways in different parts of the spectrum. The types of interaction can range from electronic excitation to molecular vibration depending on the different types of radiation, such as ultraviolet, X-rays, microwaves, and infrared radiation.

What wavelength is short wave infrared?

Shortwave infrared (SWIR) light includes wavelengths between 1,100 and 3,000 nanometers. Water absorbs shortwave infrared light in three regions: 1,400, 1,900, and 2,400 nanometers. The more water there is, even in soil, the darker the image will appear at these wavelengths.

What are short wavelength infrared used for?

Short-wave Infrared imaging (SWIR) is an advanced technique, used for producing images based on radiation in the region of the electromagnetic spectrum invisible to the naked eye.

What is a danger of infrared waves?

Prolonged exposure to IR radiation causes a gradual but irreversible opacity of the lens. Other forms of damage to the eye from IR exposure include scotoma, which is a loss of vision due to the damage to the retina. Even low-level IR absorption can cause symptoms such as redness of the eye, swelling, or hemorrhaging.

What is the difference between infrared and near infrared?

Infrared typically includes wavelengths from 700 nm to 1 mm. Near Infrared light, however, falls in the spectrum of 700 nm to 2500 nm.

What are the 7 electromagnetic waves in order?

In order from highest to lowest energy, the sections of the EM spectrum are named: gamma rays, X-rays, ultraviolet radiation, visible light, infrared radiation, and radio waves.

Which two waves lie at the ends of the visible spectrum?

Radio waves and microwaves lie at the longer end of the spectrum of electromagnetic energy (kilometers and meters to centimeters and milimeters), while x rays and gamma rays have very short wavelengths (billionths or trillionths of a meter).

What is the wavelength of near infrared?

800 to 2,500 nm
Near-infrared light generally refers to light within the wavenumber range of 12,500 to 4,000 cm-1 (wavelengths from 800 to 2,500 nm) (see Fig. 1).

Is infrared long or short-wave?

Short-wave infrared energy comes directly from the sun, but is not felt as heat. It converts into heat when it strikes an object. Long-wave infrared energy is the heat radiated from an object, which has received short-wave infrared radiation.

Is the infrared part of the electromagnetic spectrum?

Infrared radiation. For many years, visible light is the only known part of the electromagnetic spectrum, the remaining parts of the electromagnetic spectrum is not known because the visible light is only part which is visible to human eye, the remaining radiations are invisible.

Which is type of radiation has the shortest wavelength?

Light waves with shorter wavelengths (and higher frequencies) also have more energy, so types of light like gamma rays, X-rays, and ultraviolet light are more energetic than visible light, and infrared, microwaves, and radio waves are less energetic than the light in the visible spectrum.

Which is longer visible light or infrared radiation?

Infrared radiation, what we experience as heat when we hold our hand near a warm object, is somewhat longer wavelengths than visible light. Visible light is simply electromagnetic radiation in a range of wavelengths that our eyes are sensitive to.

How is the speed of light related to an electromagnetic wave?

As noted before, an electromagnetic wave has a frequency and a wavelength associated with it and travels at the speed of light, or c. The relationship among these wave characteristics can be described by vW = fλ, where vW is the propagation speed of the wave, f is the frequency, and λ is the wavelength.